Question regarding the normal distribution with a mean
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses 400 minutes or fewer?
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Determine the flow capacity in L/min of the fan that needs to be installed. Also determine the diameter of the duct if the air velocity is not to exceed 4 m/s.
Crockrill Company wants to withdraw $123,600 (including principal) from an investment fund at the end of each year for 10 years. What should be the required initial investment at the beginning of the first year if the fund earns 12%?
What must be (a) the magnitude and (b) the direction of the third force, such that the object continues to move with a constant velocity? Express your answer as a positive angle south of east.
calculate the strain-rate sensitivity (or m value) for Al 6061-T6 based on this data. Perform this evaluation at an engineering strain of 0.030. Assume
In simple linear regression through the origin (no intercept), does the line Yhat = (b)X necessarily pass through the point (Xbar, Ybar)? Please explain.
Lawler Manufacturing Company expects annual manufacturing overhead to be $900,000. The company also expects 60,000 direct labor hours costing $1,800,000.
What is the probability that the average price per square foot for a home is greater than or equal to $90?
The Virgo cluster contains about 1300 galaxies and is at a distance of 16 Mpc. The galaxies have an RMS velocity about their center of mass of 600 km/s. How many galaxies do we need to observe in Virgo to reduce the error in Ho (hubble constant) d
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